Final answer:
The group that has voted most strongly for the Republican Party since the 1980s is often referred to as the "Reagan coalition." It consisted of various groups who were attracted to Reagan's conservative policies and message, including evangelical Christians, middle-class and working-class Americans, and southern traditionalists.
Step-by-step explanation:
The group that has voted most strongly for the Republican Party since the 1980s is often referred to as the "Reagan coalition." The Reagan coalition consisted of various groups who were attracted to Reagan's conservative policies and message. These groups included evangelical Christians, middle-class and working-class Americans who opposed big government and high taxes, and southern traditionalists who were dissatisfied with the Democratic Party's position on civil rights and social issues.